Coking-retort oven



V Feb. 2s, 1929.

Original Filed Augf5. 1921 '7 ShOBtS-Sheet l PRESE/vr l Y Feb. v26, 1929."v

@BECKER toxina nn'roar oven .original Filed Aug. s, i921 Rall-75224r` 'l' .Sha'atshoot 2 A J. BECKER V coxzua n's'ronr oval Feb; 2s, 1929. Re. 17.224

Y original Filed Aug. 5, 1921 'T Suns-Sheet 5 ZREraH/v Feb. 26.,l 19,29 '-J. hacken comu aaron mm.

OvriginalFiled Aug. 5,V 1921 7 Shasta-Shogi 7 sTre-s .PATENT- for F1 c-El.-

J`osiji1 i f"'1inoi'trfar,orr1r'rsmtrnorf, PENNSYLVANIA, AssIGNoR, BY MEsNE ASSIGN- 4'3\ r l:l 15ifrs,-'ro THE Korrrznsl company, A CORPORATION-0F DELAWARE comite-amour einen. 1 f r rigiuaLNo; 1,556,749, dated October 13,1925, Serial No. 490,035, filed August 5, 1921.

f reissue filed lictoberV 19,1926. Serial No. 142,788.

This invention compi'ehends improvements of general utility in the coking retort Oven art; and `also comprehends certain Iimprovements V.especially rapplicable to ecking retort ovens-.ot the Swell-'known cross-regenerative type exemplified in the patent to H. Koppers f Nd 818,033,V dated April v17. 1906.

The invention has for objects the provision of a cokingretort oven having as important characteristics: a a novel system of flow through the. regenerators. and through the flues,th`at permits a considerable reduction inthe dimensions of the Waste gas tunnels which receive tlieiwastegases from the outlowroperating regenerators, inasmuch as the invention provides for y,the concurrent active employmentiotithe waste gas tunnels on both sides loi an oven battery, with the result that each Wazstegas tunnel need communicate with only half the total number of outflow Voperating regenerators, with a greatly decreased i vlume of flow through each tunnel. The improved eonstruetion of the invention is furthermore; of great yimportance in oven bat- -teries firedWvith .extraneously-derived gas, Vsuch as producen gas, as `the y employment of j suchgas result sin increased volume of combustion products and adequate flue spaces ior 'the ,Waste gases' must be providedto feed to :the stack'this increased Vvolume of combustion` products. jliythe invention, thc Waste gas `tunnel construction may be adequately accommodated to such increased volume ot combustion products, and yet each waste gas tunnel may beniade approximately one-half thesize'oi that employed in present practice.

` vThe.-improveinents,ot,the invention are turthQHhQL-e `applic'able to oven batteries of 'standarddesigmand'niay be incorporated in `snehgbat-terics.,Withoutresorting to any necessitv for rebuilding the battery structure.

g In additiontotbe gcneralobjects recited above, the invention hasfoi" further objects such` otherL inngrovements or advantages 'in ",gconstifuction andoperation as are found to obtain i111 the strilcturesfand'v devices o hereindescribed or claimedfj y In tllieaceompan," `1g drawintgs, :forming a partlovtfthisv pe A Martien, and Vshowing for ,y pios` s ot'cgempliiication, alv preferred form dimentica. s y y bodied' practiced, 'but without limiting "the claimed invention specifically"` to such illustrative instance or instances:

'which 'the invention may be ,Application for vplane indicated by the line Al of Fig. 1;

Fig. 3 is another horizontal section through the regenerator's of the coke oven battery, showing in pla-1i the various connections and devices for reversing` the fiow through the regenerators and through the fines;

Fig. 4 is a vertical section, taken longitudinally ofthe battery through the air'boxes and the Waste gas tunnel or stack flue, and showing the reversing connections on one side of `the battery; y f j 5 is a view similar to Fig.4bt1t showing the reversing connections on the other side of the battery;` 'i f Fig. 6 is an end nections, taken in a plane indicated by the line C-C of Fig. 3; f Y 'i ."i

Fig. 7 is an enlarged transverse vertical sectional elevation taken in a` plane indicated by the lineB-B of Fig. 3; 1

Fig. 8 is a crosstvise vertical sectional elevation tlirough a coke oven battery embody'- i(ir-Gr, and H-I-I of Fig. 9; and

` 9is a composite vertical sectionalfelevation taken longitudinally of the coke'oven view' ofthe reversing con'- battery, in planes indicated by the lines K-v-K l y The same characters of reference indicate the' same parts in cach-of the several views of the drawings'.`

In theembodiment illust-rated in the rlraf\'\':

ings, the :invention is incorpo ated in acombmatloncolte-oven battery, r. e.."a"'battery *having fprovis'ion forbeing operatedeitlie'r with producer. gas" 'as the fuel, v'o`1""'vv'ith 'the coke oven gasderived lfrom the disti'llationfof the coalinu the' eoking" chambers or retorts of the battery.' For convenience, the present description Wlll be confined to the present illustrated yembodiment `of the inventio'n'in such a combination eokefoven battery; the.

the invention, are susceptible of other applications, such for example, as ordinary so'- called coke ovens employing coke oven .gas as the fuel, or ordinary so-called gas ovens employing producer gas as the fuel; hence, the scope of the invention is not confined to the specific'use and specificembodiment herein described as an illustrative example.

Referring to the drawings: "I'here are illustrated views ot' a coke oven battery or plant of the by-product type, having features above specified; said oven-battery embodiesvin its construction a plu'ality ot' crosswise elongated heating walls 11, 11, and a plurality of' intermediate crosswisc elongated coking chambers 12, 12; the heating walls forni the side walls of the respectiveI coking chambers. 12, as shown more particularly in `Fig. 9, and, in the present instance, are supported, to"- gether with the coking chambers, by the heavy supporting or pillar walls 13, 13, which extend crosswise of the battery andare located, as shown in '.Fig. 9, beneath the superstructure of the battery. These pillar walls` lcollectively1 form the main support for the entire superstructure of the oven battery, and are themselves supported upon a flat mat or` platform which constitutes the subfoundation upon which the entire battery rests. The\ coal to be coked is charged into the several coking chambers or ovens through charging holes v14, located inthe top l5 of the oven battery and positioned directly above the' ovens' or chambers 12, as shown in Fig. 9..

These charging holes 14 are equipped with the usual removable covers which are removed during the charging of the individual ovens or coking chambers and are placed in position to closeV the tops of such coking chambers during the enti're coking or distilling operation. The gases of distillation pass from the tops of the several coliing chambers 12 through the usual gas outlets, and thence through ascension pipes (not shown) into the usual gas collecting main which carries `the distillation produc-ts to the by-prodnct.. re'- covcry apparatus.

Heat for coking the charges of coal in the several ovens or chambers 12 is derived from the heatlng walls 11,'wh1eh, as above mentioned, extend crosswise of the batteryv at the sides of the coking chambers. Referringr more particularly to Figs. 8 and 9, each heat"- ing wall 11 is constituted of a plur'alitv of flame or combustion flues 17. The flame llues of' each heating wall are, in accordance with the present embodimentof' the invention, op-

. eratively disposed into two groups, G andv H,

all ot' the lues of the several'groups G operating for flow concurrently in one direction, while all of the flues of the several groups H. operate concurrently for flow in the opposite direction.` That is to say, when the flame flues ofl the several groups G are operating for inflow or burnmg, the llamev ilues of the `groups G, vbecmne outflow operating ilues,

.and the outflow operating llues, such as the flues of the several groups H, become inflow operating flues.

The crosswise regencrators 18 of the retort m'cn or battery :ire located at a lower level Athan the aforesaid heating walls 11 and coking chambers 12 and, in the present instance,

extend in parallelism between the pillar walls 13. Located in the middle lengthwise vertical plane of the coke oven battery, vis a vert-ical partition 19, as shown in Figs. 1 and l 8, which partition extends all the way up from the mat of the. battery to the bottom of the overlying coking chambers and from one to the other of the pillar walls 13. The regenerators which are respectively located on opposite sides of the battery, extend inwardly tosaid partition 19 and are separated thereby, as clearly shown in Figs. 1 and 9. This arrangement permits control from opposite sides of the battery of the flow through the re ,generators and the lines. Each regenerator 18 is a chamber containing open brick work,l commonly called checker work, and indicated at 2() with a distributing sole channel 21 underneath such checker work, the channels 21 forming the soles of such chambers and opening up into the checker` work. The several regenerators are heated in alternation, by the hot combustion products that draw off from the flame or combustion flues hereinbefore mentioned and then impart such heat to the medium that they feed into these flame flues. According to theinvent'ion, the series K and L of regenerators thatl are respectively located on opposite sides 'el' the battery, as

generators of theisevcral groups M operateylw concurrently for flow 1n the same `d1rcct1on,

while all the regenerators of the several groups N are operating concurrently for flow in the opposite direction. When the battery is burning .producer gas or other cxtraneously derived gas as 'the fuel in the burning flame fines, the several inflow operating regeuera- .tors, such as the regenerators of the groups'li'l of both series K and L,veach comprise gas relgenerators-P and air regenerators A, while concurrently all'the regenerators of the several groupsN are operating as waste gas regenerators 'W. On reversal, the groupsof regenerators` N lthat heretofore operated as 'waste gas regenerators become gas andV` air regenerators and the groups of re! generators `M Iconcurrently become Waste` gas, generators. According to ,the system of 'flow through the regenerators, Waste gas regenerators alternateivith inflow operating regenerators on each side of the battery, the inflow operating regenerators on one side being aligned with the `Waste gas regenerators on the other. Consequently waste gas is discharged from regenerators concurrently oniboth sides. ot' the batteryin stead of entirely on one side and then entirely on the other, after a subsequent reversal, as

`has heretot'cre been a common practice in this art.

The regenerators of each group M and N are provided with series ot ducts 23, allot' which lead respectively to individual flame fines 17 of the same heating wall. With this construction, each flame Hue 17 communicates by a pair ot ducts 23 with adjacent separate regenerators of a group M or N, through Which adjacent separate regenerators' flotv is-Inaintained concurrently in the sanieidiheating Wall are on one side of the batteryand the outflow lues ot the same heating Wall are on the other side of the battery, the reversalof flow through thc lues takes place crossulated by means of usual movable dampers or lWise of the battery, in accordance with `the usual Koppers practice. However, during the period between each reversal outflow is maintained' in the tlues ot' alternate heating Walls on each side of the battery, while inflow. 1s maintained in the other groups of tlues on each side of thebattery. Y c ports 2i may be reg The draftthro ugh the sliding bricks 27, positioned in the ordinary ivay in the bottoms of the horizontal [lues 25V and adaptedto bereached by access fines 28 which extend from the top of the horizontal fines-in the several heating walls to the top 15 Aof the battery, there being-an access flue positioned over each Haine or combi'istiontlue ot' each hea tingwall. n

Extending crosswise of the battery in the pillar Walls-13 and located beneath the heating wal-l 11 therea'bove, are pairs. ot gas sup ply channels 29 and 30. These channels 29 and' 3() are for the purpose ot' supplying coke oven gas to the several flame lues on each side of the center partition 19, vand to accomplish this end, the channels 29 communicate with the individual lues 17iby means of ducts 31 vInasmueh as, f according to the present embodiment of the Minvention, the linflovs7 operating flues oil each that lead from such channels 29 individually intoV the bottoms of individual flues; and the Achannels 30 also` communicate with the bottoms of individual fines by means of similarly connected ducts. Within the several ducts are disposed the usual nozzles 32. The supply of coke oven gas tothe respective channels 29 and 30 is derived from coke oven gas means of usualtype and respectively located on the opposite vsides of the battery and ex vtending longitudinally therealong. 'Suitable `means is provided for admitting or cutting ott' the supply of gas with respect to the channels 29 and 30, it being understood that the gas supply is either concurrently maintained or concurrently shut off from the'channels 29 Referring noiv more particularly to Figsf4 l and 3, the sole channels 2l of the groups ot' regenerators M, of both series K and L of regenerators, respectively communicate' with flow boxes 33; similarly the sole channels 2l, of the regenerators yot the several groups N inunicate with flow boxes This results in the arrangement of two series of tloiv boxes 4on both sides of' the battery respectively come v 33 and34 along both sides ot the battery, the

pairs, which pairs alternate with pairs of flow boxes of the other series,

The several tloiv boxes of the series 33 are provided with lids 35 for opening and vclos- 'ing the interior ofthe respective flow boxes to the outer air, and the several loiv boxes of the series 34 are respectively provided `flow boxes of each series being disposed into With similar lids 36. Each air box 'lid 35 i suitable source of supply ot producer gas and j .adapted yto be opened up to or sluit olf from its source of supply by means otl any vimproved control valve. 'The valve that com trols the supply to ,the 4producer gas main 46 is not herein illustrated for the reason that the'specitic construction ot such valve isY ininiaterial to the present inventioi'i. Leading from. the producer gas marin on eitherl side ot the battery into one low boxofteach pair '33 and into one flow box ot each pair 3a are branch producer gas supply pipes 4T' and 48 respectively l provided with y control valves 4l), 50. it being understood that all ot the control valves ot the series 491 are open, whilea'll ot' the control valves of the series 5() are closed', or viceversa.` I .,v f

In accordance f with the inventioiigtwo Waste gas tunnels orstack tliies 51 and '52 extend longitudinally of the battery, one on Vone side of the battery andgtherother on the a valve 55 permitting each tunnel to be opened up to or shut otl` from communication with the stack 54.; as desired. The valves 55 may be adjusted in the manner of dampers to` control the flow through the respective stack llues 51, 52pm which such valves are located. lilach A[low box 33 or 34 on one side of the battery is provided with a port 56 that leads to a channel 57 which opens up into the aforesaid waste gas main 5l; siinilarlyeach flow box 33 (ii-'34 on the opposite side of the battery is provided with a port 58 leading to a 4channel. 59 which communicates with the waste gas tunnel 52, llVith this construction the waste gastunnel 5l is connected by channels 57 wit-h the several air boxes that control the exhaust from outflow operating regeneratois on one side of the battery, and the waste gas tunnel 52 is independently connected by a -lurthcr series ot channels with 'the flow boxes that control the exhaust from the outflow operating regenerators on the other side of the battery. As outflow is maintained concurrently in some of the regeneratoi's on each side of the battery7 both ot the waste gas tunnels 5l and 52 operate concurprovided with mushroom valves (30 for opening and closing the ports 56 with respect to the channels 57 leading to the Waste gas timnel 51; similarly the several flow boxes ot' 'the groups and 34 on the other side ot' the l'iattery are provided with mushroom valves (il for opening and closing the ports 58 with respect to the channels-59 that lead to the waste. gas tunnel 52. (it) are operated by valve operating levers (32 and the mushroom valves (il are operated bv valve operating levers G3. All of the valve operating levers of the series G2 and 63 are controlled or operated by a single cable 4 which leads to the air valve and damper reversing maehint` (l5. On one opei'ation ot the said machine (S5, the mushroom valves of the flow boxes of the groups 34 on both sides of the battery are opened to establish communi- 'ation between such flow boxes and the Waste gas tunnels 51 and 52` while concurrently the mushroom valves of the other groups of flow boxes are closed to cut oft such flow boxes -from communication with the waste gas tunnels; on reverse operation of the machine 65, the mushroom valves of the groups The mushroom valves of flow boxes 33 are opened, While the musliroom valves of the groups of flow boxes 34 are closed, to establish communication between the flow boxes 33 and the exhaust tunnels and concurrently to shut ott the flow boxes 34 from communication With said exhaust tunnels.

According to the illustrated embodiment of the invent-ion, only one flow box ofeaeh group is provided Witha lid operating lever 37; similarly only one flow box of each group 34 is provided with a lid operating lever 38. The producer gas supply vpipes 47 and 48 respectively lead to the other floiv boxes of the groups 33 and 34. All of the lid operating levers 37 and 38 of both groups 33 and 34 ot' flow boxes on both sides of the battery are controlled and.ope1ated by the reversing cable 3 which leads to the aforesaid reversing machine One opera-tion of said reversing machine G5 is effective to open the lids 35 of the flow boxes of the groups 33 which function 'for air intake, whilel concurrently the lids 3G ot the How boxes 34 remain closed; reverse operation of the said reversing machine is reffective to open the flow box lids 36 of the groups 34 which function for air intake, and to close the flow box lids 35 of the groups 33. The l'uel gas valves 49 in the gas supply pipes 47 leading to the gas intake' flow boxes 'of' the groups 33 on both sides of the battery are provided with operating levers 66; similarly' thefuel gas controlling valves 50in the supply pipes 48 leading to the gas intake flow boxes of the groups 34 are provided With operating levers 67.l The series of operating levers 66 on both Sides ofthe battery are controlled and operated by cables 1 and 6, leading to the gas valve machine G8; the series ot' valve operating levers 67 on both sides of the battery are controlled and operated by cables 2 and 5 leading to the gas valve ma.- chine (59. rThe operation of the gas valve machines GS and 69 is effective to open eitherthev entire series of` valves 49. and close the entire .series ot' valves 50 or, on reversal, to open the entire series ot' valves 50 and close the entire series of valves 49. As indicated in Fig. 4 the valves 49 are in the open position and the valves are in the closed posilion.

special generator gas, .such as ordinary producer gas, is illustrated in the aecomg'ianying drawings. Assuming that the several regeneiators'of the groups M on both sides of the. battery are operating for inflow and the several regenerators ot the groups N on both sides ofthe battery are operating concurrentl'vl for outflow, the. several flues of the groups G are operating as burning flues. while dow-n- .flow is maintained in the several fines of the groups H. When so operating, the mushroom valves of the groups of flow boxes 34 '.l`he op -\.iation olf the battery, when using.r a

sitions, producer gas flows into the severalA inflow operating regenerators P of the groups M,"while air flows into the several inflow operating regenerators A of the same groups.`

-As both inflow regenerators P and A are, connected with groups of inflow operating flues.

G of the heating walls, atmospheric air and producer gas flow into allof the inflow operating flues G and igniting burns upwardly in said flues. The waste gases from the upburning flues, comprising the groups G pass into the horizontal bus flues andv flowing in alternate heating walls to the one side of the battery and in the other heating walls to the other side of the battery pass downwardly through the outflow regenerators N 'into 'the several flow boxes' 34' and; thence through the-r open inu'shroom valves into the wastefgas tuni nels 51 vand '52 on bothsides of the battery. On reversal, the several regenerators which heretofore operated for inflow become out- .flow `regenerators and the inflow operating flues become outflow operating flues.

' When operating the battery with coke o ven vgas as the fuel; the How boxes of both'groups 33 and 34 are cuto` at all times from the'pro'- ducer gas mains 46. All of the flow boxes of both groups are provided with lid operating p levers 37 and 38, so that on operation ofthe reversing mechanism, air flows into the' open vflow boxesof either group 33 or 34. The air reversing cable 3 is provided with additional operating connections c foreffecting the op-l eration of the lid operating levers and 38 employed, when burning cokeoven gasas the battery fuel. The flow through the battery takes place, during coke oven gas operation, in exactly the same manner as when employing producer gas, `the only except-ion being that,r bothinflow operating regenerator's of `eacligroup M or N feed air to the fluesin'stcad i of air and producer gas, the fuel gas supply beingl derived from the fuel gas channels 29 .and 30. Vlin coke oven' gas operation," the wastegases pass in exactly the saine manner to thewaste gas tunnels 51 and 52.

The invention as hereinbefore set forth is fnembodied in a particular .form of construe f tion,`but may be variously embodied 4within the scope of the claims hereinafter made.

1. In a coke oven battery,` incombination:

spectively constituted of vertical combustion flues operatively disposed. into two groups of consecutive similarly-operable flues; reversible regenerators on both sides of the battery 4located below the cokin'g chambers and the heating walls and parallel therewith, said regenerators being communicably connected with the fluesand operatively disposed iii'tb i.

inflow and outflowgroups, the inflow groups alternating with the outflow groups on-each side of the battery; a producer gas supply; reversing valve connections between said producer gas supply and one regenerator of each waste gas tunnels on the saine sides of the battery 'a's the regenerators; substantially as specified.

2. In a coke ovenbattery, in combination: a plurality of coking chambers ;A heating walls contiguous to such coking chambersv and respectively constituted of vertical combustion flues operatively disposed into two groups of consecutive lsimilarlyy-operable flues; regenerators on both sides of the battery located below the `coking Vchambers and the heating p walls and parallel therewith, said regenerators being communicably connected with the flues and operatively disposed into inflow and outflow pairs, the inflow pairs alternating with the outflow pairs on each'side of the battery a'produce'r gas supply; reversingval've connections between said producer gas supply and one regenerator of each pair on both sides of the battery; reversing air valve connections for the other i'egenerator of each pair on both sides of the battery; vwaste gas tunnels located respectively on opposite sides of the battery; and valve connections forestablishing communication concurrentlyl between the outflow regenerators on each side of the battery respectively with the waste gas tunnels on the saine sidcs of the battery as the regenerators; substantially as specified.

"i 3.` In a coke oven battery, in combination:

consecutive similarly-operable flues; regen` .erators on both s ides of the battery located be- ,low'the coking chambers and. the heating walls and parallel therewith, said regenerallt tors being communicably connected with the flues and operatively disposed into inflow and outow groupsTthe inflow groups alternating with the outflow groups on each side of the battery; a producer ga's supply; reversing valve connections between said producer `gas supplyand one regenerator of each group on both sides of the'battery reversing air valve spectively constituted of consecutive si-inila rly-operable vertical combustion fines; regenerators located below the coking chambers and the heating walls and parallel therewith, said regenerators being cominunicably connected with the fines and operatively disposedinto inflow and'outflow groups, the inflow groups alternating with the outflow groups; a producer gas supply; reversing` valve connections between said producer gas supply and one regenerator of each group;

reversing air valve connections for the other,

regenerator of eaclr'group; waste gas tunnels located respectively'on opposite sides of the battery; andvalve connections for establishing communication concurrently between the outflow regenerators respectively with said waste gas tunnels; substantially as specified.

5. -In a coke oven, battery, in combination: a plurality of coking chambers beating walls contiguous lto such cokingchambers and respectively constituted of consecutive similarly-operable vertical combustion flues; regenerators located below the colring chambers and the heating walls and parallel therewith, said regenerators being eommunicably connected with the fiues and operatively disposed into inflow and outflow pairs, the inflow pairs alternating with the outflow. pairs; a producer gas supply; reversing' valve connections between said producer-gas `supply and onev regenerator of each pair; reversing air valve connections for the other regenerator of each pair; waste gas tunnels located respectively `on opposite sides of the battery; and valve connections for establishing eonniiunication concurrently between the outflow rcgenerators respectively with both said waste gas tunnels; substantially as specified.

6. In a coke ovenbattery, in combination: a plurality of coking chambers heating walls contiguous to such coking chambers and respectively constituted of vertical combustion flues operatively disposed into two groups of consecutive similarly-operable flues; regenerators on both sides of the battery located below the coking chambers and the heat-ing'walls and parallel therewith, said regenerators being communicably connected .with the flues and operatively disposed into inflow and outflow groups, the inflow groups alternating with the outfiowv groups on each side ofthe battery; waste gas tunnels located respectively on opposite sides of the battery;

spectively constituted of vertical combustion flues operatively disposed into two groups of' consecutive similarly-operable fines; regenerators on both sides of the battery located below the coking chambers and the heating walls and parallel therewith, said regenerators being counnnnicably connected with the fines and operatively disposed into inflow and outfiow pairs, the inflow pairs alternating 'with the outflow pairs on cach side of the battery; waste gas tunnelsv located respectively on opposite sides of the battery; andvalve connections for establishing communication .concurrently between outflow regenerators on each side of' the battery respectively with Waste gas tunnels on the saine sides of the battery as the rcgenerators; substantially as specified.

8. A colring retort oven provided with a plurality of coking chambers; heating walls having consecutive similarly-operable flucs; inflow and outflow regcnerators located on both-sides of-said oven and ,communi-cably connected with the flues, each regenerator being individual to a single heating wall, Waste vgas tunnels located respectively on opposite sides of said oven; and valve connections for establishing communication concurrently between the outflow regenerators on each side of said oven respectively with the Waste gas tunnels on the same sides of the oven as the regenerators; substantially as specified.

A coke oven battery provided with a plurality of coking chambers; heating walls havinl consecutive siin'ilarl 7-o )erable flu'es v h 7 inflow and o ut-fiow regcnerators communieably connected with the fines, each regenerator being individual to a single heating wall, the inflow regenerators alternating` with the outflow regenerators; waste gas tunnels located respectively on opposite sides ofthe oven; and valve connections for establishing communication concurrently between the outflow regenerators and both said waste gas tunnels; substantially as specified.

10. A coke oven provided with a plurality of coking chambers, heating walls lhaving consecutive similarly-operable flues, inflow and outflow regenerators communicably connected with the flues, the infiow regenerators being jointly operable for conveyingr air to the heating walls or'separately operable for conveying thereto air and combustible gas,

waste gas tunnels located respectively on options for establishing communication between the outflow regenerators and both said Waste gas tunnels; substantinlly'as specified. i

11. A coke oven battery provided with a plurality of coking chambers, beating Walls having consecutive similarly-operableV fines,

air and gas inflow and Waste gas outflow -re generators located on both sides of said oven and communionbly connected with the lues, and Waste gus tunnels also located onbotli sidesiofsaid oven and communicably connectable concurrently with all the outflow regenerators; substantially as specfled.

12. A coke oven battery provided With :L

plurality of coking chambers, heating walls? 15 having consecutive similarly-operable flues,

inflow andl outflow regenerators `loeztted on v concurrently with all the outflow regenerators; substantially as specified.` v

In testimony whereof, I havehereunto set my hand. y

JOSEPH BECKEE, 

